Recent Log Entries

Hall A FFB: Engaged at 150uA w/o Feed-Forward. Engaging FF Causes 1C04H Saturation

Log Number: 3787293Logbook(s): Entry Makers: moserBody: 

We have managed to get FFB on w/RF on w/xA taking 150uA. This is all without Feedforward, however. Finding that when engaging FF DAC, getting a 1C04H saturation fault.

First thing we did in attempts to rid ourselves of saturation faults was re-steer the 1C line horizontally such that the first ~6 correctors were zero'ed out. 1C04H included. Still getting saturation faults.

Looking at the FFT of the three horizontal BPMs in use, seeing some very strange signatures on the 1C07 (top in F1) and 1C16 (bottom in F1), but not on 1C12. 300Hz, 420Hz, and 660Hz?

Autolog restore

Log Number: 3787292Logbook(s): Tags: Body: saver ran from opsl632
Data from: /usr/user4/mccops/burt/download/Cmoller_10393MeV.snap
Restored file: /tmp/02-19-20_08:43:02.snap


Hall C moller

Autolog save

Log Number: 3787291Logbook(s): Tags: Body: saver ran from opsl632

Saved: mock 02-19-20 08:42:50 {A:1 B:5 C:5 E:1050 A=CW B=CW C=BS D=CW 0R08=148.80 No dumps in. Autosave prior to restore.

Ion Chamber limits

Log Number: 3787287Logbook(s): Entry Makers: armdBody: 

Just to have it in the halog: Chandan informed me that the present ion chamber limits (for the 1%C) target are deliberately set 20% higher than nominal, so that there won't be excessive trips while OPS is working on re-establishing FFB.

I am told (by the RC) that the experts are working on the FFB problem. We see 150 microA sporadically in the hall.

Operator SIGN IN

Log Number: 3787270Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Mock
DATE:             02/19/2020
SHIFT:               Day

The operator has read the following:
  • ELOG
  • PD Shift Plan
  • Radiation Surveys for PSS Segments in Controlled Access
  • PSS Log

Operator SIGN IN

Log Number: 3787267Logbook(s): Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Jones
DATE:             02/19/2020
SHIFT:               Day

The operator has read the following:
  • ELOG
  • PD Shift Plan
  • Radiation Surveys for PSS Segments in Controlled Access
  • PSS Log

Autolog save

Log Number: 3787243Logbook(s): Tags: Body: saver ran from opsl632

Saved: kiarra 02-19-20 07:46:10 {A:1 B:5 C:5 E:1050 A=CW B=CW C=CW D=CW 0R08=18.15 No dumps in.

COMMENT ON *Check BSY Beam Dump He Window and Expansion Tk Water Level

Log Number: 3787231Logbook(s): Body: 

BSY Dump has been tripping off approx. every 2 hours. Low
Level Indicator &/or Differential Pressure Switch are suspected
cause. System has been masked as it is not needed for
present operational program at this time. Further investigation
&/or repair will be done during an opportunistic access when it
occurs

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